﻿using Genespy.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.Storage;
using Windows.Media.Capture;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234237

namespace Genespy
{
    /// <summary>
    /// A basic page that provides characteristics common to most applications.
    /// </summary>
    public sealed partial class AudioDisplayPage : Page
    {

        private StorageFile selectedFile;
        private StorageFolder storageFolder;
        private int audioNum;
        private List<MediaObject> audioList = new List<MediaObject>();

        private NavigationHelper navigationHelper;
        private ObservableDictionary defaultViewModel = new ObservableDictionary();

        /// <summary>
        /// This can be changed to a strongly typed view model.
        /// </summary>
        public ObservableDictionary DefaultViewModel
        {
            get { return this.defaultViewModel; }
        }

        /// <summary>
        /// NavigationHelper is used on each page to aid in navigation and 
        /// process lifetime management
        /// </summary>
        public NavigationHelper NavigationHelper
        {
            get { return this.navigationHelper; }
        }


        public AudioDisplayPage()
        {
            this.InitializeComponent();
            audioNum = 1;
            storageFolder = ApplicationData.Current.LocalFolder;
            this.navigationHelper = new NavigationHelper(this);
            this.navigationHelper.LoadState += navigationHelper_LoadState;
            this.navigationHelper.SaveState += navigationHelper_SaveState;
        }

        /// <summary>
        /// Populates the page with content passed during navigation. Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session. The state will be null the first time a page is visited.</param>
        private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
            audioList = MainPage.selectedReport.audio;

            foreach (MediaObject mo in MainPage.selectedReport.audio)
            {
                mediaList.Items.Add("Audio " + audioNum++ + " - " + mo.date);
            }
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="sender">The source of the event; typically <see cref="NavigationHelper"/></param>
        /// <param name="e">Event data that provides an empty dictionary to be populated with
        /// serializable state.</param>
        private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)
        {
            MainPage.selectedReport.audio = audioList;
        }

        #region NavigationHelper registration

        /// The methods provided in this section are simply used to allow
        /// NavigationHelper to respond to the page's navigation methods.
        /// 
        /// Page specific logic should be placed in event handlers for the  
        /// <see cref="GridCS.Common.NavigationHelper.LoadState"/>
        /// and <see cref="GridCS.Common.NavigationHelper.SaveState"/>.
        /// The navigation parameter is available in the LoadState method 
        /// in addition to page state preserved during an earlier session.

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedTo(e);
        }

        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedFrom(e);
        }

        #endregion


        private void on_click_play(object sender, RoutedEventArgs e)
        {
            mediaPreview.Play();
        }

        private void on_click_pause(object sender, RoutedEventArgs e)
        {
            mediaPreview.Pause();
        }

        private void on_click_stop(object sender, RoutedEventArgs e)
        {
            mediaPreview.Stop();
        }

        private void on_value_changed_time_slider(object sender, RangeBaseValueChangedEventArgs e)
        {
            TimeSpan ts = new TimeSpan(0, 0, 0, 0, (int)timeSlider.Value);
            mediaPreview.Position = ts;
        }

        async private void on_select_change_media(object sender, SelectionChangedEventArgs e)
        {
            Uri uri = audioList.ElementAt(mediaList.SelectedIndex).mediaStorageUri;

            selectedFile = await StorageFile.GetFileFromApplicationUriAsync(uri);

            var stream = await selectedFile.OpenAsync(FileAccessMode.Read);

            mediaPreview.SetSource(stream, selectedFile.ContentType);
        }

        private void on_media_opened(object sender, RoutedEventArgs e)
        {
            timeSlider.Maximum = mediaPreview.NaturalDuration.TimeSpan.TotalMilliseconds;
        }

        private void on_media_ended(object sender, RoutedEventArgs e)
        {
            mediaPreview.Stop();
        }

        async private void on_click_capture_audio(object sender, RoutedEventArgs e)
        {
            CameraCaptureUI cameraUI = new CameraCaptureUI();

            StorageFile capturedMedia =
                await cameraUI.CaptureFileAsync(CameraCaptureUIMode.Video);

            capturedMedia = await capturedMedia.CopyAsync(storageFolder);

            if (capturedMedia != null)
            {
                var stream = await capturedMedia.OpenAsync(FileAccessMode.Read);
                mediaPreview.SetSource(stream, capturedMedia.ContentType);

                DateTime time = DateTime.UtcNow;
                audioList.Add(new MediaObject(capturedMedia, time));
                mediaList.Items.Add("Audio " + audioNum++ + " - " + time);
            }
        }
    }
}
